They can be designed longitudinally of transversely. Both cars and trucks have torsion bar suspensions. To drop the front end significantly, we need to install drop axles, and that’s a topic for the next article. Turning the adjustment bolt clockwise will tighten it, raising the amount of load that can be placed on the bar. Using the torsion bar to adjust ride height is just to fine tune the ride height-maybe a couple inches at most. Torsion Bar Adjustment. Turn the adjustment bolt clockwise with a socket wrench to increase the spring rate of the torsion bar, and lift the vehicle's suspension. When adjusted, the torsion bar beneath your vehicle raises and lowers your front tires. Most Chevrolet and GMC trucks will use an 18mm socket head. How to Adjust a Torsion Bar. They provide the suspension coil springs, and leaf springs offer with the added benefit of ride height adjustability. This will raise the vehicle when it is taken off the jack stand. Turning it counterclockwise will lower the available spring rate and cause the car to sit lower. Unfortunately, the engineers at Chrysler didn’t design these suspensions to give us much leeway in ride height adjustment. Adjust the torsion bar.